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Kicking off the show with a reprisal of his Boston native character Sully, Fallon and Dratch brought back their beloved Denise and Sully sketch in the cold open, with their infamous impromptu make-out sessions to boot ("You're a moron. You are!"). Poehler even popped up in the sketch (and got fondled by Fallon while she was at it).

Along with his skits, Fallon's impersonations were spot on, particularly those of Regis Philbin ("Regis is back baby! You can't kill me, I'm like Tupac Shakira"), and the barrage of performers he took on in his skit with Michael Bublé, "Bublé Duets", like Sting, Justin Bieber and Russell Brand.

And while Fallon went on to play a pop-and-locking horse in a War Horse skit, he even made time to spoof himself (courtesy of Andy Samberg). In the mirror bit, Fallon sat in front of the glass, talking himself up about his hosting stint, while Samberg sat on the other side of it, playing, well, Fallon.

Later, Fallon popped up on Weekend Update with former anchors Poehler and Fey, who all joined current anchor Seth Meyer for a Weekend Update joke-off.

Your information may be shared with other NBCUniversal businesses and used to better tailor our services and advertising to you. For more details about how we use your information, see our Privacy Policy. If you are located outside of the U.S., your information may be transferred to, processed and used in the U.S.